Annotation of OpenXM_contrib2/asir2000/gc/mach_dep.c, Revision 1.4
1.1 noro 1: /*
2: * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
3: * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
4: *
5: * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
6: * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
7: *
8: * Permission is hereby granted to use or copy this program
9: * for any purpose, provided the above notices are retained on all copies.
10: * Permission to modify the code and to distribute modified code is granted,
11: * provided the above notices are retained, and a notice that the code was
12: * modified is included with the above copyright notice.
13: */
14: /* Boehm, November 17, 1995 12:13 pm PST */
1.4 ! noro 15: # include "private/gc_priv.h"
1.1 noro 16: # include <stdio.h>
17: # include <setjmp.h>
18: # if defined(OS2) || defined(CX_UX)
19: # define _setjmp(b) setjmp(b)
20: # define _longjmp(b,v) longjmp(b,v)
21: # endif
22: # ifdef AMIGA
23: # ifndef __GNUC__
1.4 ! noro 24: # include <dos.h>
1.1 noro 25: # else
26: # include <machine/reg.h>
27: # endif
28: # endif
29:
30: #if defined(__MWERKS__) && !defined(POWERPC)
31:
32: asm static void PushMacRegisters()
33: {
34: sub.w #4,sp // reserve space for one parameter.
35: move.l a2,(sp)
36: jsr GC_push_one
37: move.l a3,(sp)
38: jsr GC_push_one
39: move.l a4,(sp)
40: jsr GC_push_one
41: # if !__option(a6frames)
42: // <pcb> perhaps a6 should be pushed if stack frames are not being used.
43: move.l a6,(sp)
44: jsr GC_push_one
45: # endif
46: // skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
47: move.l d2,(sp)
48: jsr GC_push_one
49: move.l d3,(sp)
50: jsr GC_push_one
51: move.l d4,(sp)
52: jsr GC_push_one
53: move.l d5,(sp)
54: jsr GC_push_one
55: move.l d6,(sp)
56: jsr GC_push_one
57: move.l d7,(sp)
58: jsr GC_push_one
59: add.w #4,sp // fix stack.
60: rts
61: }
62:
63: #endif /* __MWERKS__ */
64:
1.2 noro 65: # if defined(SPARC) || defined(IA64)
66: /* Value returned from register flushing routine; either sp (SPARC) */
67: /* or ar.bsp (IA64) */
68: word GC_save_regs_ret_val;
69: # endif
70:
1.1 noro 71: /* Routine to mark from registers that are preserved by the C compiler. */
72: /* This must be ported to every new architecture. There is a generic */
73: /* version at the end, that is likely, but not guaranteed to work */
74: /* on your architecture. Run the test_setjmp program to see whether */
75: /* there is any chance it will work. */
76:
77: #ifndef USE_GENERIC_PUSH_REGS
78: void GC_push_regs()
79: {
80: # ifdef RT
81: register long TMP_SP; /* must be bound to r11 */
82: # endif
1.3 noro 83:
84: # if defined(MIPS) && defined(LINUX)
85: /* I'm not sure whether this has actually been tested. */
86: # define call_push(x) asm("move $4," x ";"); asm("jal GC_push_one")
87: call_push("$2");
88: call_push("$3");
89: call_push("$16");
90: call_push("$17");
91: call_push("$18");
92: call_push("$19");
93: call_push("$20");
94: call_push("$21");
95: call_push("$22");
96: call_push("$23");
97: call_push("$30");
98: # undef call_push
99: # endif /* MIPS && LINUX */
100:
1.1 noro 101: # ifdef VAX
102: /* VAX - generic code below does not work under 4.2 */
103: /* r1 through r5 are caller save, and therefore */
104: /* on the stack or dead. */
105: asm("pushl r11"); asm("calls $1,_GC_push_one");
106: asm("pushl r10"); asm("calls $1,_GC_push_one");
107: asm("pushl r9"); asm("calls $1,_GC_push_one");
108: asm("pushl r8"); asm("calls $1,_GC_push_one");
109: asm("pushl r7"); asm("calls $1,_GC_push_one");
110: asm("pushl r6"); asm("calls $1,_GC_push_one");
111: # endif
112: # if defined(M68K) && (defined(SUNOS4) || defined(NEXT))
113: /* M68K SUNOS - could be replaced by generic code */
114: /* a0, a1 and d1 are caller save */
115: /* and therefore are on stack or dead. */
116:
117: asm("subqw #0x4,sp"); /* allocate word on top of stack */
118:
119: asm("movl a2,sp@"); asm("jbsr _GC_push_one");
120: asm("movl a3,sp@"); asm("jbsr _GC_push_one");
121: asm("movl a4,sp@"); asm("jbsr _GC_push_one");
122: asm("movl a5,sp@"); asm("jbsr _GC_push_one");
123: /* Skip frame pointer and stack pointer */
124: asm("movl d1,sp@"); asm("jbsr _GC_push_one");
125: asm("movl d2,sp@"); asm("jbsr _GC_push_one");
126: asm("movl d3,sp@"); asm("jbsr _GC_push_one");
127: asm("movl d4,sp@"); asm("jbsr _GC_push_one");
128: asm("movl d5,sp@"); asm("jbsr _GC_push_one");
129: asm("movl d6,sp@"); asm("jbsr _GC_push_one");
130: asm("movl d7,sp@"); asm("jbsr _GC_push_one");
131:
132: asm("addqw #0x4,sp"); /* put stack back where it was */
133: # endif
134:
135: # if defined(M68K) && defined(HP)
136: /* M68K HP - could be replaced by generic code */
137: /* a0, a1 and d1 are caller save. */
138:
139: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
140:
141: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
142: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
143: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
144: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
145: /* Skip frame pointer and stack pointer */
146: asm("mov.l %d1,(%sp)"); asm("jsr _GC_push_one");
147: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
148: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
149: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
150: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
151: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
152: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
153:
154: asm("addq.w &0x4,%sp"); /* put stack back where it was */
155: # endif /* M68K HP */
156:
157: # if defined(M68K) && defined(AMIGA)
158: /* AMIGA - could be replaced by generic code */
159: /* a0, a1, d0 and d1 are caller save */
160:
161: # ifdef __GNUC__
162: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
163:
164: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
165: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
166: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
167: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
168: asm("mov.l %a6,(%sp)"); asm("jsr _GC_push_one");
169: /* Skip frame pointer and stack pointer */
170: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
171: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
172: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
173: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
174: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
175: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
176:
177: asm("addq.w &0x4,%sp"); /* put stack back where it was */
178: # else /* !__GNUC__ */
179: GC_push_one(getreg(REG_A2));
180: GC_push_one(getreg(REG_A3));
1.4 ! noro 181: # ifndef __SASC
! 182: /* Can probably be changed to #if 0 -Kjetil M. (a4=globals)*/
! 183: GC_push_one(getreg(REG_A4));
! 184: # endif
1.1 noro 185: GC_push_one(getreg(REG_A5));
186: GC_push_one(getreg(REG_A6));
187: /* Skip stack pointer */
188: GC_push_one(getreg(REG_D2));
189: GC_push_one(getreg(REG_D3));
190: GC_push_one(getreg(REG_D4));
191: GC_push_one(getreg(REG_D5));
192: GC_push_one(getreg(REG_D6));
193: GC_push_one(getreg(REG_D7));
194: # endif /* !__GNUC__ */
195: # endif /* AMIGA */
196:
197: # if defined(M68K) && defined(MACOS)
198: # if defined(THINK_C)
199: # define PushMacReg(reg) \
200: move.l reg,(sp) \
201: jsr GC_push_one
202: asm {
203: sub.w #4,sp ; reserve space for one parameter.
204: PushMacReg(a2);
205: PushMacReg(a3);
206: PushMacReg(a4);
207: ; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
208: PushMacReg(d2);
209: PushMacReg(d3);
210: PushMacReg(d4);
211: PushMacReg(d5);
212: PushMacReg(d6);
213: PushMacReg(d7);
214: add.w #4,sp ; fix stack.
215: }
216: # undef PushMacReg
217: # endif /* THINK_C */
218: # if defined(__MWERKS__)
219: PushMacRegisters();
220: # endif /* __MWERKS__ */
221: # endif /* MACOS */
222:
1.3 noro 223: # if defined(I386) &&!defined(OS2) &&!defined(SVR4) \
224: && (defined(__MINGW32__) || !defined(MSWIN32)) \
1.1 noro 225: && !defined(SCO) && !defined(SCO_ELF) \
1.4 ! noro 226: && !(defined(LINUX) && defined(__ELF__)) \
1.3 noro 227: && !(defined(FREEBSD) && defined(__ELF__)) \
1.4 ! noro 228: && !(defined(NETBSD) && defined(__ELF__)) \
! 229: && !(defined(OPENBSD) && defined(__ELF__)) \
! 230: && !(defined(BEOS) && defined(__ELF__)) \
1.1 noro 231: && !defined(DOS4GW)
232: /* I386 code, generic code does not appear to work */
233: /* It does appear to work under OS2, and asms dont */
234: /* This is used for some 38g UNIX variants and for CYGWIN32 */
235: asm("pushl %eax"); asm("call _GC_push_one"); asm("addl $4,%esp");
236: asm("pushl %ecx"); asm("call _GC_push_one"); asm("addl $4,%esp");
237: asm("pushl %edx"); asm("call _GC_push_one"); asm("addl $4,%esp");
238: asm("pushl %ebp"); asm("call _GC_push_one"); asm("addl $4,%esp");
239: asm("pushl %esi"); asm("call _GC_push_one"); asm("addl $4,%esp");
240: asm("pushl %edi"); asm("call _GC_push_one"); asm("addl $4,%esp");
241: asm("pushl %ebx"); asm("call _GC_push_one"); asm("addl $4,%esp");
242: # endif
243:
244: # if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \
1.4 ! noro 245: || ( defined(I386) && defined(FREEBSD) && defined(__ELF__) ) \
! 246: || ( defined(I386) && defined(NETBSD) && defined(__ELF__) ) \
! 247: || ( defined(I386) && defined(OPENBSD) && defined(__ELF__) )
1.1 noro 248:
249: /* This is modified for Linux with ELF (Note: _ELF_ only) */
250: /* This section handles FreeBSD with ELF. */
1.3 noro 251: /* Eax is caller-save and dead here. Other caller-save */
252: /* registers could also be skipped. We assume there are no */
253: /* pointers in MMX registers, etc. */
254: /* We combine instructions in a single asm to prevent gcc from */
255: /* inserting code in the middle. */
256: asm("pushl %ecx; call GC_push_one; addl $4,%esp");
257: asm("pushl %edx; call GC_push_one; addl $4,%esp");
258: asm("pushl %ebp; call GC_push_one; addl $4,%esp");
259: asm("pushl %esi; call GC_push_one; addl $4,%esp");
260: asm("pushl %edi; call GC_push_one; addl $4,%esp");
261: asm("pushl %ebx; call GC_push_one; addl $4,%esp");
1.1 noro 262: # endif
263:
1.4 ! noro 264: # if ( defined(I386) && defined(BEOS) && defined(__ELF__) )
! 265: /* As far as I can understand from */
! 266: /* http://www.beunited.org/articles/jbq/nasm.shtml, */
! 267: /* only ebp, esi, edi and ebx are not scratch. How MMX */
! 268: /* etc. registers should be treated, I have no idea. */
! 269: asm("pushl %ebp; call GC_push_one; addl $4,%esp");
! 270: asm("pushl %esi; call GC_push_one; addl $4,%esp");
! 271: asm("pushl %edi; call GC_push_one; addl $4,%esp");
! 272: asm("pushl %ebx; call GC_push_one; addl $4,%esp");
! 273: # endif
! 274:
1.3 noro 275: # if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \
276: && !defined(USE_GENERIC)
1.1 noro 277: /* I386 code, Microsoft variant */
278: __asm push eax
279: __asm call GC_push_one
280: __asm add esp,4
281: __asm push ebx
282: __asm call GC_push_one
283: __asm add esp,4
284: __asm push ecx
285: __asm call GC_push_one
286: __asm add esp,4
287: __asm push edx
288: __asm call GC_push_one
289: __asm add esp,4
290: __asm push ebp
291: __asm call GC_push_one
292: __asm add esp,4
293: __asm push esi
294: __asm call GC_push_one
295: __asm add esp,4
296: __asm push edi
297: __asm call GC_push_one
298: __asm add esp,4
299: # endif
300:
301: # if defined(I386) && (defined(SVR4) || defined(SCO) || defined(SCO_ELF))
302: /* I386 code, SVR4 variant, generic code does not appear to work */
303: asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
304: asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
305: asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
306: asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
307: asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
308: asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
309: asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
310: # endif
311:
312: # ifdef NS32K
313: asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
314: asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
315: asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
316: asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
317: asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
318: # endif
319:
1.3 noro 320: # if defined(SPARC)
1.1 noro 321: {
322: word GC_save_regs_in_stack();
323:
1.2 noro 324: GC_save_regs_ret_val = GC_save_regs_in_stack();
1.1 noro 325: }
326: # endif
327:
328: # ifdef RT
329: GC_push_one(TMP_SP); /* GC_push_one from r11 */
330:
331: asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */
332: asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */
333: asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */
334: asm("cas r11, r9, r0"); GC_push_one(TMP_SP);
335: asm("cas r11, r10, r0"); GC_push_one(TMP_SP);
336:
337: asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */
338: asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */
339: asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */
340: asm("cas r11, r15, r0"); GC_push_one(TMP_SP);
341: # endif
342:
343: # if defined(M68K) && defined(SYSV)
344: /* Once again similar to SUN and HP, though setjmp appears to work.
345: --Parag
346: */
347: # ifdef __GNUC__
348: asm("subqw #0x4,%sp"); /* allocate word on top of stack */
349:
350: asm("movl %a2,%sp@"); asm("jbsr GC_push_one");
351: asm("movl %a3,%sp@"); asm("jbsr GC_push_one");
352: asm("movl %a4,%sp@"); asm("jbsr GC_push_one");
353: asm("movl %a5,%sp@"); asm("jbsr GC_push_one");
354: /* Skip frame pointer and stack pointer */
355: asm("movl %d1,%sp@"); asm("jbsr GC_push_one");
356: asm("movl %d2,%sp@"); asm("jbsr GC_push_one");
357: asm("movl %d3,%sp@"); asm("jbsr GC_push_one");
358: asm("movl %d4,%sp@"); asm("jbsr GC_push_one");
359: asm("movl %d5,%sp@"); asm("jbsr GC_push_one");
360: asm("movl %d6,%sp@"); asm("jbsr GC_push_one");
361: asm("movl %d7,%sp@"); asm("jbsr GC_push_one");
362:
363: asm("addqw #0x4,%sp"); /* put stack back where it was */
364: # else /* !__GNUC__*/
365: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
366:
367: asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one");
368: asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one");
369: asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one");
370: asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one");
371: /* Skip frame pointer and stack pointer */
372: asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one");
373: asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one");
374: asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one");
375: asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one");
376: asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one");
377: asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one");
378: asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one");
379:
380: asm("addq.w &0x4,%sp"); /* put stack back where it was */
381: # endif /* !__GNUC__ */
382: # endif /* M68K/SYSV */
383:
1.2 noro 384: # if defined(PJ)
385: {
386: register int * sp asm ("optop");
387: extern int *__libc_stack_end;
388:
389: GC_push_all_stack (sp, __libc_stack_end);
390: }
391: # endif
1.1 noro 392:
393: /* other machines... */
394: # if !(defined M68K) && !(defined VAX) && !(defined RT)
395: # if !(defined SPARC) && !(defined I386) && !(defined NS32K)
1.3 noro 396: # if !defined(POWERPC) && !defined(UTS4)
397: # if !defined(PJ) && !(defined(MIPS) && defined(LINUX))
1.1 noro 398: --> bad news <--
1.2 noro 399: # endif
1.1 noro 400: # endif
401: # endif
402: # endif
403: }
404: #endif /* !USE_GENERIC_PUSH_REGS */
405:
406: #if defined(USE_GENERIC_PUSH_REGS)
407: void GC_generic_push_regs(cold_gc_frame)
408: ptr_t cold_gc_frame;
409: {
410: /* Generic code */
411: /* The idea is due to Parag Patel at HP. */
412: /* We're not sure whether he would like */
413: /* to be he acknowledged for it or not. */
414: {
415: static jmp_buf regs;
416: register word * i = (word *) regs;
417: register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
418:
419: /* Setjmp on Sun 3s doesn't clear all of the buffer. */
420: /* That tends to preserve garbage. Clear it. */
421: for (; (char *)i < lim; i++) {
422: *i = 0;
423: }
1.4 ! noro 424: # if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \
! 425: || defined(UTS4) || defined(LINUX)
1.1 noro 426: (void) setjmp(regs);
427: # else
428: (void) _setjmp(regs);
429: # endif
1.3 noro 430: # if defined(SPARC) || defined(IA64)
431: /* On a register window machine, we need to save register */
432: /* contents on the stack for this to work. The setjmp */
433: /* is probably not needed on SPARC, since pointers are */
434: /* only stored in windowed or scratch registers. It is */
435: /* needed on IA64, since some non-windowed registers are */
436: /* preserved. */
437: {
438: word GC_save_regs_in_stack();
439:
440: GC_save_regs_ret_val = GC_save_regs_in_stack();
441: }
442: # endif
1.1 noro 443: GC_push_current_stack(cold_gc_frame);
444: }
445: }
446: #endif /* USE_GENERIC_PUSH_REGS */
447:
448: /* On register window machines, we need a way to force registers into */
449: /* the stack. Return sp. */
450: # ifdef SPARC
451: asm(" .seg \"text\"");
452: # ifdef SVR4
453: asm(" .globl GC_save_regs_in_stack");
454: asm("GC_save_regs_in_stack:");
455: asm(" .type GC_save_regs_in_stack,#function");
456: # else
457: asm(" .globl _GC_save_regs_in_stack");
458: asm("_GC_save_regs_in_stack:");
459: # endif
1.4 ! noro 460: # if defined(__arch64__) || defined(__sparcv9)
! 461: asm(" save %sp,-128,%sp");
! 462: asm(" flushw");
! 463: asm(" ret");
! 464: asm(" restore %sp,2047+128,%o0");
! 465: # else
! 466: asm(" ta 0x3 ! ST_FLUSH_WINDOWS");
! 467: asm(" retl");
! 468: asm(" mov %sp,%o0");
! 469: # endif
1.1 noro 470: # ifdef SVR4
471: asm(" .GC_save_regs_in_stack_end:");
472: asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
473: # endif
474: # ifdef LINT
475: word GC_save_regs_in_stack() { return(0 /* sp really */);}
476: # endif
477: # endif
478:
1.2 noro 479: /* On IA64, we also need to flush register windows. But they end */
480: /* up on the other side of the stack segment. */
481: /* Returns the backing store pointer for the register stack. */
482: # ifdef IA64
1.4 ! noro 483: # ifdef __GNUC__
1.2 noro 484: asm(" .text");
485: asm(" .psr abi64");
486: asm(" .psr lsb");
487: asm(" .lsb");
488: asm("");
489: asm(" .text");
490: asm(" .align 16");
491: asm(" .global GC_save_regs_in_stack");
492: asm(" .proc GC_save_regs_in_stack");
493: asm("GC_save_regs_in_stack:");
494: asm(" .body");
495: asm(" flushrs");
496: asm(" ;;");
497: asm(" mov r8=ar.bsp");
498: asm(" br.ret.sptk.few rp");
499: asm(" .endp GC_save_regs_in_stack");
1.4 ! noro 500: # else
! 501: void GC_save_regs_in_stack() {
! 502: asm(" flushrs");
! 503: asm(" ;;");
! 504: asm(" mov r8=ar.bsp");
! 505: asm(" br.ret.sptk.few rp");
! 506: }
! 507: # endif
1.2 noro 508: # endif
1.1 noro 509:
510: /* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */
511: /* returns arg. Stack clearing is crucial on SPARC, so we supply */
512: /* an assembly version that's more careful. Assumes limit is hotter */
513: /* than sp, and limit is 8 byte aligned. */
514: #if defined(ASM_CLEAR_CODE) && !defined(THREADS)
515: #ifndef SPARC
516: --> fix it
517: #endif
518: # ifdef SUNOS4
519: asm(".globl _GC_clear_stack_inner");
520: asm("_GC_clear_stack_inner:");
521: # else
522: asm(".globl GC_clear_stack_inner");
523: asm("GC_clear_stack_inner:");
524: asm(".type GC_save_regs_in_stack,#function");
525: # endif
1.4 ! noro 526: #if defined(__arch64__) || defined(__sparcv9)
! 527: asm("mov %sp,%o2"); /* Save sp */
! 528: asm("add %sp,2047-8,%o3"); /* p = sp+bias-8 */
! 529: asm("add %o1,-2047-192,%sp"); /* Move sp out of the way, */
! 530: /* so that traps still work. */
! 531: /* Includes some extra words */
! 532: /* so we can be sloppy below. */
! 533: asm("loop:");
! 534: asm("stx %g0,[%o3]"); /* *(long *)p = 0 */
! 535: asm("cmp %o3,%o1");
! 536: asm("bgu,pt %xcc, loop"); /* if (p > limit) goto loop */
! 537: asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
! 538: asm("retl");
! 539: asm("mov %o2,%sp"); /* Restore sp., delay slot */
! 540: #else
1.1 noro 541: asm("mov %sp,%o2"); /* Save sp */
542: asm("add %sp,-8,%o3"); /* p = sp-8 */
543: asm("clr %g1"); /* [g0,g1] = 0 */
544: asm("add %o1,-0x60,%sp"); /* Move sp out of the way, */
545: /* so that traps still work. */
546: /* Includes some extra words */
547: /* so we can be sloppy below. */
548: asm("loop:");
549: asm("std %g0,[%o3]"); /* *(long long *)p = 0 */
550: asm("cmp %o3,%o1");
551: asm("bgu loop "); /* if (p > limit) goto loop */
552: asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
553: asm("retl");
554: asm("mov %o2,%sp"); /* Restore sp., delay slot */
1.4 ! noro 555: #endif /* old SPARC */
1.1 noro 556: /* First argument = %o0 = return value */
557: # ifdef SVR4
558: asm(" .GC_clear_stack_inner_end:");
559: asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner");
560: # endif
561:
562: # ifdef LINT
563: /*ARGSUSED*/
564: ptr_t GC_clear_stack_inner(arg, limit)
565: ptr_t arg; word limit;
566: { return(arg); }
567: # endif
568: #endif
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